main(n,m,l)
{
	for(gets(&n);
		~scanf("%d%d",&n,&m);
		printf("%d\n",n*(n+1)/2*m*(m+1)/2-l*(l+1)*(2*l+1)/6-abs(m-n)*l*(l+1)/2))
		l=m<n?m:n;
}
